Type of data able to be returned by a function or method
In computer programming, the return type (or result type) defines and constrains the data type of the value returned from a subroutine or method.[1] In many programming languages (especially statically-typed programming languages such as C, C++, Java) the return type must be explicitly specified when declaring a function.
the return type is int. The program can therefore rely on the method returning a value of type int. Various mechanisms are used for the case where a subroutine does not return any value, e.g., a return type of void is used in some programming languages:
publicvoidreturnNothing()
^Kernighan, Brian W.; Ritchie, Dennis M. (1988). The C Programming Language (2nd ed.). Prentice Hall. ISBN 0-13-110362-8.
In computer programming, the returntype (or result type) defines and constrains the data type of the value returned from a subroutine or method. In many...
object-oriented programming, a covariant returntype of a method is one that can be replaced by a "narrower" type when the method is overridden in a subclass...
of its computation, by returning a value to that calling code. The data type of that value is called the function's returntype. In the C++ programming...
) { <statements> return <expression of typereturn-type>; } A function with non-void returntype should include at least one return statement. The parameters...
contemporary type systems go beyond JavaScript's simple type "function object" and have a family of function types differentiated by argument and returntypes, such...
string and boolean) types since PHP 7.0. PHP 7.0 also has type declarations for function returntypes, expressed by placing the type name after the list...
dynamic typing of JavaScript. function add(left: number, right: number): number { return left + right; } Primitive types are annotated using the types number...
function to return execution of the program to the calling function, and report the value of exp. If a function has the returntype void, the return statement...
The void type, in several programming languages derived from C and Algol68, is the returntype of a function that returns normally, but does not provide...
dependent types are dependent functions and dependent pairs. The returntype of a dependent function may depend on the value (not just type) of one of...
function does not cover the entire space corresponding to the data type of the function's return value, a value known to be impossible under normal computation...
and type theory, an option type or maybe type is a polymorphic type that represents encapsulation of an optional value; e.g., it is used as the return type...
header <stdarg.h>. In C++, the returntype can also follow the parameter list, which is referred to as a trailing returntype. The difference is only syntactic;...
science, a type theory is the formal presentation of a specific type system. Type theory is the academic study of type systems. Some type theories serve...
between 09:00 CET and 18:00 CET for the EUR and USD variants of any returntype, while the CAD, GBP and JPY variants are available as end-of-day calculation...
attr trailing-return-type in that order; each of these components is optional". If it is absent, the returntype is deduced from return statements as...
for algebraic data types, data structures, or other components (e.g. "string", "array of float", "function returning boolean"). Type systems are often...
function f(int) and return an error. Similarly, the linker will not be able to detect that the returntype of f is different, and return an error. Otherwise...
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